User manual BEHRINGER EUROLIVE PROFESSIONAL

[. . . ] PROFESSIONAL SERIES Users manual Version 1. 0 March 2005 B1220 PRO B1520 PRO B1800X PRO EUROLIVE ENGLISH EUROLIVE PROFESSIONAL SERIES IMPORTANT SAFETY INSTRUCTIONS 1) Read these instructions. 7) Before positioning your speakers, you must always make sure that the surface underneath them is completely firm. A surface that easily vibrates is not sufficiently safe for your speakers, therefore: as a general rule, only place your speakers onto even, firm ground surfaces. 8) Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat. [. . . ] There, you will find information about the recommended crossover frequency range. We recommend a slope rate of at least 12 dB, whereby a higher value guarantees the best possible performance. Our recommendations are only examples of possible interactions between different EUROLIVE speakers. Depending on your own personal sound requirements and the genre of the music being played, other combinations are of course possible. + 2. 2 How to prevent feedback Always place the front of house speakers ahead of the microphones (from the audiences perspective), and never behind. B1220 PRO or B1520 PRO) or an in-ear monitoring system to hear the stage performers. 2. 3 How to avoid feedback when working with record players (DJ applications) In applications with record players, bass feedback can occur. Bass feedback occurs when low frequencies get back to the pickup and are re-reproduced on the speakers. The most common causes for this are: speakers located too closely to the record player, a room with a wooden floor, or presence of a podium or a platform. In such cases, it is best to move the speakers away from the record player and banish them from the stage, so that they are located on firm ground. Another option is to use raised stands, which prevent the speakers from having a direct contact with the ground. 3. 2 Looping through the subwoofer signal (B1800X PRO) The B1800X PRO subwoofer from the EUROLIVE PROFESSIONAL SERIES features two speaker connectors. In BI-AMPING mode, the PINS 2-/2+ of the input are connected directly with the speaker. PINS 1-/1+ of the input are connected to the PINS 1-/1+ of the output and the signal can be simply looped through. To this end, please adhere to the specifications given in chapter 4. + Please keep in mind that when you switch the B1800X PRO subwoofer to BI-AMPING mode, the input signal is routed to PINS 2-/2+. In this case, PINS 1-/1+ merely serve to loop the signal through! 3. OPERATING MODES 5 EUROLIVE PROFESSIONAL SERIES 3. 3 PARALLEL Input (B1220 PRO and B1520 PRO) The EUROLIVE B1220 PRO and B1520 PRO loudspeakers feature two speaker inputs laid out in parallel. You can alternatively connect one of the connectors to the output on your power amp and tap into the signal from the amp once again on the second connector, in order to, for example, feed this signal into an additional loudspeaker. This way, you can create stacks consisting of speakers with different impedance values. 5. 3 Fuses We do not recommend the use of fuses with audio applications. Damage to loudspeakers can be the result of high peak signals and high output power. However, fuses can only offer protection from one of these two factors, and never from both. Additionally, fuse resistors are sometimes nonlinear, leading to distortion and unpredictable overdriving. 5. 3. 1 Protecting your equipment s s s Always try to find the optimal signal level. For this purpose, our proven AUTOCOM PRO-XL MDX1600, COMPOSER PRO-XL MDX2600 and MULTICOM PRO-XL MDX4600 compressors offer an outstanding solution. All models can be used as a limiter: the audio signal doesnt overdrive any more, and unpleasant peaks are effectively avoided. Our ULTRADRIVE PRO DCX2496 and SUPER-X CX3400/ CX2310 crossovers are particularly well-suited for protecting your equipment: for each output, they have independent limiters. + ATTENTION: Never connect the output signals of different power amps to both parallel inputs at the same time. [. . . ] Any product deemed eligible for repair or replacement under the terms of this warranty will be repaired or replaced. If the product needs to be modified or adapted in order to comply with applicable technical or safety standards on a national or local level, in any country which is not the country for which the product was originally developed and manufactured, this modification/adaptation shall not be considered a defect in materials or workmanship. The warranty does not cover any such modification/adaptation, irrespective of whether it was carried out properly or not. Under the terms of this warranty, BEHRINGER shall not be held responsible for any cost resulting from such a modification/adaptation. [. . . ]